XML 210 R155.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Restrictions on Cash, Securities, Bank Dividends, Loans or Advances (Details) | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
--- | --- | ---
Regulated Operations [Abstract] |  |
Reserve requirements with federal reserve | $ 113,341,000 | $ 129,429,000
FHLB stock | 19,777,000 | 15,070,000
FHLB required investment amount | 7,471,000 | $ 7,181,000
Amount transferable loans maximum | $ 133,162,000 |
Regulatory restrictions on payments of dividends, excess surplus ratio | 10 |
Company borrowings | $ 0 |

X
- Definition Amount transferable loans maximum. + References No definition available. + Details
Name: | rnst_AmountTransferableLoansMaximum
Namespace Prefix: | rnst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Federal Home Loan Bank Stock, Required Investment Amount + References No definition available. + Details
Name: | rnst_FederalHomeLoanBankStockRequiredInvestmentAmount
Namespace Prefix: | rnst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Inter company borrowed funds. + References No definition available. + Details
Name: | rnst_InterCompanyBorrowedFunds
Namespace Prefix: | rnst_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Regulatory Restrictions on Payment of Dividends, Excess Surplus, Ratio + References No definition available. + Details
Name: | rnst_RegulatoryRestrictionsonPaymentofDividendsExcessSurplusRatio
Namespace Prefix: | rnst_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Reserve requirements with federal reserve. + References No definition available. + Details
Name: | rnst_ReserveRequirementsWithFederalReserve
Namespace Prefix: | rnst_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 325 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=75031641&loc=d3e63345-112809 + Details
Name: | us-gaap_FederalHomeLoanBankStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_RegulatedOperationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration